Tilapia are the second most farmed fish globally. Produced primarily in tropical developing countries in intensive pond systems, welfare challenges include overcrowding, disease, and poor water quality management.
Tilapia welfare is a significant scale issue that receives inadequate attention. While tilapia are more stress-tolerant than salmonids, they are still sentient fish with clear welfare needs. High stocking densities cause chronic stress, social aggression, and fin damage. Poor water quality — common in small-scale, informal pond systems — causes physiological stress and disease susceptibility. Streptococcosis causes painful eye lesions and neurological dysfunction before death. Slaughter practices in tilapia production are largely unregulated and commonly involve slow methods causing prolonged suffering. The global scale of tilapia production — billions of fish annually — means even modest welfare improvements would affect an extraordinary number of individuals. The lack of formal welfare standards in most producing countries is a significant gap.